diff --git a/.gitignore b/.gitignore
index cef4239..e056435 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 *.so
-/types
\ No newline at end of file
+/types
+/test
\ No newline at end of file
diff --git a/loader.go b/loader.go
index 5de9785..ee8d2ce 100644
--- a/loader.go
+++ b/loader.go
@@ -1,9 +1,18 @@
 package gfw
 
-import "git.xdrm.io/gfw/internal/config"
+import (
+	"git.xdrm.io/gfw/checker"
+	"git.xdrm.io/gfw/internal/config"
+)
 
 // Init initilises a new framework instance
-func Init(path string) (*Server, error) {
+//
+// - path is the configuration path
+//
+// - if typeChecker is nil, defaults will be used (all *.so files
+//   inside ./types local directory)
+//
+func Init(path string, typeChecker *checker.TypeRegistry) (*Server, error) {
 
 	/* (1) Init instance */
 	inst := &Server{
@@ -19,5 +28,14 @@ func Init(path string) (*Server, error) {
 	}
 	inst.config = config
 
+	/* (3) Store registry if not nil */
+	if typeChecker != nil {
+		inst.Checker = typeChecker
+		return inst, nil
+	}
+
+	/* (4) Default registry creation */
+	inst.Checker = checker.CreateRegistry(true)
+
 	return inst, nil
 }
diff --git a/types.go b/types.go
index 21002f1..c5d2ad4 100644
--- a/types.go
+++ b/types.go
@@ -1,13 +1,15 @@
 package gfw
 
 import (
+	"git.xdrm.io/gfw/checker"
 	"git.xdrm.io/gfw/internal/config"
 )
 
 type Server struct {
-	config *config.Controller
-	Params map[string]interface{}
-	err    Err
+	config  *config.Controller
+	Params  map[string]interface{}
+	Checker *checker.TypeRegistry // type check
+	err     Err
 }
 
 type Request struct {